Improved door-bell



N. F. CONE.

Door Bell.

No. 41,683. Patented Feb. 23, I864.

9:. I fweni ar UNITED STATES PATENT OFFICE.

NATHAN F. CONE, OF LA CROSSE, YVISCONSIN.

IMPROVED DOOR-BELL.

Specification forming part of Letters Patent No. 41,683, dated February 23, 1864.

To aZZ wlwm it may concern.-

Be it known that I, NATHAN F. GONE, of the city and county of La Orosse, in the State of Wisconsin, have invented a new and useful Improvement in Door-Bells; and I do hereby declare the following to be full and exact description of the same, reference being had to the accompanying drawings, making part of this specification, in which- Figure 1 represents a horizontal section of my invention, taken in the plane indicated by the line a a, Fig. 2. Fig. 2 is a vertical section of the same, the line a a, Fig. 1, indicating the plane of section. Fig. 3 is a sectional elevation in the line y y, Fig. 2.

Similar letters of reference indicate corresponding parts in both figures.

This invention relates to an improvement on the door-bell for which I obtained Letters Patent on the 8th day of September, 1863, and which. is ranked with that class of doorbells in which a striking mechanism is brought in such relation to a stationary bell that by rotating a crank or knob in either direction a hammer will be actuated and the bell struck.

My present invention consists in a peculiar manner of securing the bell proper in position to be acted upon by the hammers, whereby all external appliances for that purpose may be dispensed with. and the entire mechanism lnclosed by or within said bell.

In order that others skilled in the art to which my invention appertains may be ena bled to fully understand and use the same, I will proceed to describe its construction and operation.

In the accompanying drawings, A represents a bell, formed or cast of any suitable metal. A represents a screw-threaded stenr, cast or formed in one piece with the bell A at the center thereof, and adapted to secure the bell in proper position over the striking mechanism by being screwed into a corresponding threaded aperture in the curved bar B, which in turn may be cast or formed in one piece with the bed-plate O. The bed-plate 0 supports the striking mechanism, and may be attached to the door, or to any other place where the bell is to be used, by screws 0.

D D are two hammers, which are formed.

upon curved arms b b, and act upon opposite sides of the bell. The arms b b of the hammers have their fulcra on posts 0 c, which are formed with or rigidly inserted into the bedplate 0, and they are curved in and subjected to the action of springs d d, which cause their inner ends to bear against the frog or tumbler G. This frog turns loosely on the pivot e, and motion is imparted to it by a cam, E, with three (more or less) projections, which act on the inner end of the frog and cause its outer end to force back either one of the hammers, according to the direction in which the cam is moved.

The cam E is attached to the square end of a rod,f, which passes through the door or post to which the bell is to be secured, and which turns freely in the bed-plate 0. To the outer end of the rodfa knob or handle, F, is secured.

The springs d d, which act on the arms of the hammers, are wound round studs 9 g, and one of their ends passes through a slot in the corresponding arm, whereas their other ends bear against ribs h h, projecting from the bedplate 0. These ribs serve also to gage the backlash when the bell is forcibly rung and to prevent the hammers from coming in contact with the inner surface of the bell, except at that moment when by the action of the mechanism said hammers strike the bell.

The frog G and the arms of thehammers' D D and the springs d d are held in place by a wire, h, which is bent around the five posts, 0 c g g e, and which is retained by notches filed in the upper ends of said posts.

The bell is very simple in its construction, and it requires but a trifling exertion of the hand to rotate the knob or handle F, and thereby cause the hammers to strike the bell.

the arrow marked near it in Fig. 2 the frog is caused to'act on the arm I) of the hammer D, and the hammer D remains at rest. By rotating the cam in the' opposite direction to said arrow the hammer D is caused to strike, and the hammer D remains at rest.

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

1. In combination with the bridge or bar B, the screw'threaded stem A, formed or cast By turning the cam E in the direction of in one piece with the bell A, so as to avoid The above specification of my new and useor permanently close any aperture in the. said ful improvement in deer-hells signed this 18th hell, substantially as described.

2. In combination with the bell A, rotating shaftf, cam E, frog G, and one or more harmmars, D I), the bar B, incloscd Within the bell and employed for the attachment of the latter, in the manner herein explained.

day of December, 1863.

. NATHAN IS. GONE.

VVit'nesses CHARLES DU 1301s, JAMES H. GRIDLEY. 

